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.BOMAN LEAD AND GRAYON HOLDER.

Patented. July 25, 1 882.

a v d WITNESS/5.5'

vUNITED STATES cLAES vv. Boi/TAN, E

PATENT QEEICE.

NEW YORK, N. Y., ASSIG'NOE To JOSEPH EECKEN- DOREEE, oF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 261,659, dated July 25, 1882.

Application filed May 12, 1882.

'To all whom it may concern Be it known that I, CLAES W. Bon/LAN, of the city, county, and State of New York, have invented certain new and useful Improvements in Lead and Crayon Holders, of which the following is a specification.

Myinvention relates'to that kind of lead and crayon holders known as the Automatic,in which the clamping and releasing of' the lead xo is effected by the longitudinal movement of a lead-containing tube or other instrumentality for operating the lead-clamping mechanism, said tube being usually moved in 011e direction by pressure applied to a pressure-cap and in the other direction by a retracting-springi My invention has reference mainly to the lead clamping or grasping device; and it consists in forming that device of an expansible ring composed of one or more turns of spirallyzo coiled wire, which is carried by the lead-containing tube, and has one or both of its ends connected to the sheath or case, or some appropriate part of the pencilwhich does not partake of the longitudinal movement of the said tube, in such a manner that the movement of the tubev in one direction will cause the clamping-ring to expand and release the lead and inthe other direction will cause the ring to contract and close upon the lead.

The nature of my invention and the manner in whichY the same is or may be carried into effect will be understood by reference to the accompanying drawings, in which- Figure l is a longitudinal central sectional elevation of a holder embodying my invention.

Fig. 2'is an elevation of the front portion of the same with the sheath in section. Fig. 3

is a similar view, representing the parts in. a

different position. Figs. 4 and 5 are sections 4o on line 4 4, Fig. 2, and line 5 5, Fig. 3, respect ively. Y

A is the case or sheath, terminating in the usual tip or nozzle, a'. B is the lead-containing tube, longitudinally movable within the sheath.

4 5 C is the pressure-cap, mounted upon the rear end of the tube; and D is the retractin g-sprin g,

confined between the head ofthe pressure-cap and the rear end of the sheath. These parts require no further description, inasmuch as in 5o their constructionl and general arrangement or inclined slot, d2, formed in the ferrule a'.

(No model.)

they resemble like parts of the Automatic pencil, save that the lead-containing tube in the present instance does not terminate in leadgrasping jaws. n

The leadclamping device carried by the tube B consists of an expansible ring, b, composed of one or more turns of spirally-coiled wire. This expansible clamping-ring is carried by the lead-containing tube, and in the present instance is placed within the tube at or near its front end. One end, c, ofthe coil is attached to the tube, and the attachment in the present instance is made by turning this end outwardly and causing it to project through a longitudinal slot, c', in the tube, as well as through a like slot, c2, in the ferrule a of the sheath, on which the tip a lits. The opposite end, d, ot' the coil is bentoutwardly, and projects through a transverse slot, d', in the tube into a spiral 7o It is preferred to contract the part ot'Y the tube in advance of the point where, the expansible clamping ring is situated to a size tojust about fit the lead x,- and to this end it will be found convenient to insert in the front end of the tube a smaller and shorter tube,B', secured in place by brazing, soldering, or any other convenient way. The ring in its normal position is contracted,so as to grasp the lead, and in this position its external diameter should be sutlicientl y less than the internal diameter of the lead-containingtube to leave room for it to expand to the requisite extent to release the lead. It is represented in its normal position in Fig. 2, the end d of the coil being at or near the rear end ot' the inclined slot d2 in the ferrule a', and the ring being closed upon the lead. By pushing forward the pressure-cap, and consequently moving forward the lead containing tube B, the end d will be caused to travel along the inclined slot d2, as indica-ted in Fig. 3, with the effect of expanding the coil or ring and of releasing the lead. As soon as pressure is removed froml the' cap the retracting-spring returns the'parts to their original 95 position.

It is manifest that, if desired, the end c can also be arranged,like the end d, to work in an inclined slot in the sheath or ferrule'. It is also manifest that the manner of mounting and seroo curing the expausible clamping-ring can be considerably varied without departure from my invention. I do not therefore restrict myself to the specilic details herein described in illustration of my invention; but

1. The combination, with the pencil sheath or case and the longitudinally-movable leadcontainingtube,ofan expansiblclead-clamping ring composed of a coil of one or more turns of Wire carried by the said tube, and having its ends connected to the said tube and sheath in such manner as to be thereby caused to expand or contract, according to the direction in which the tube is moved, substantially as and for the purposes hereinbefore set forth.

2. The combination, with the pencil-sheath and longitudinally-movable lead-containing tube, ofthe pressure-ca p, the retreating-spring, and the expansible lead-clamping ring', comzo posed of a wire coil carried by said tube and connected atits ends to the tube andthe sheath, substantially as and for the purposes hereinbefore set forth.

In testimony whereofI have hereunto set my 25 hand this 17th day of March, A. D. 1882.

CLAES W. BOMAN.

Witnesses:

G. S. BRAISTEL, J 0E W. SWAINE. 

